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Finding the Fourth Proportional to 391,494.55, 540,236.89 and 230,318.46

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Solution

The fourth proportional to 391,494.55, 540,236.89 and 230,318.46 is: 317,824.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,494.55 : 540,236.89 = 230,318.46 : x
  2. Step 2: Convert to fraction form
    391,494.55/540,236.89 = 230,318.46/x
  3. Step 3: Cross multiply
    391,494.55x = 540,236.89 × 230,318.46
  4. Step 4: Simplify right side
    391,494.55x = 124,426,528,539.99
  5. Step 5: Solve for x
    x = 124,426,528,539.99/391,494.55
  6. Step 6: Final answer
    x = 317,824.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.